Printing process applicable generally but more especially to bank-notes, bonds, and other securities.



E. H. FARMER. FRINTiNG PROCESS APPLICABLE GENERALLY BUT MORE ESPECIALLY T0 BANK NOTES, BONDS, AND

OTHER SECURITIES.

APPLICATION FILED FEB. 15, 1915.

1,147,317, Patented July 20, 1915.

COLUMBIA FLANOGRAPH c0.. WASHINGTON, D. c.

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ERNEST HOV-TART) FARMER, OF LONDON, ENG-LAND, ASSIGNOR- 0F NINE-TENTI-IS TO 'WI-IITEI-IEAD, MORRIS & COMPANY, LIMITED, OF LONDON, ENGLAND.

. PRINTING PROCESS APPLICABLE GENERALLY BUT MORE ESPECIALLY TO BANK- Y NOTES, BONDS, AND OTHER SECURITIES.

Specification of Letters Patent.

Patented July20, 1915.

Application filed February 15, 1915. Serial N 0. 8,413.

1 0 all whom it may concern Be it known that I, ERNEST HOWARD .l-Bmrnn, a subject of the King of Great Britain, residing at 136 Junction road, Upper Holloway, London, England, have invented new and useful Improvements-in and Relating to Printing Processes Applicable Generally but More Especially to Bank-Notes, Bonds, and other Securities;

and I do hereby declare that the following,

is a full, clear, and eXact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the production of a picture or an effect of a particular character applicable for printing generally,but the invention is especially applicable for producing a characteristic pictureor design upon a security, which cannot be retraced by hand or machine without such attempted retracing being visibly apparent.

In the present description the term tone picture will be used to designate any picture, photograph, view, drawing, design or other like representation which includes or involves a visual effect of varying gradations of tone; the term security will be used to include bonds, notes, checks, stamps, and like money value securities and scrip of all descriptions; and the term design will be used to designate decorative lines or elements which are bounded by sharply defined edges and may be in black and white or in other colors.

The essential feature of the present inven tion consists in impressing upon a lineal printing surface, representing a bank note or other characteristic lineal design, a tone picture in such a manner that the design is modified or converted or transformed into a pictorial representation of the tone picture without itself being rendered visually inconspicuous and, in a sense, therefore, the final product represents, the design as well as the tone picture. 7

The chief object in the application of the invention for securities is to so modify the bank note design or part thereof that it cannot be traced without such tracing being visibly apparent, owing to the conversion into a pictorial effect. The application also supplies a visible characteristic for the se curity easily recognizable. Also in the application to securities the picture effect according to the present invention may be produced in conjunction with other independent safety devices for preventing forgery of the security by other known methods of forgery, such as by camera contact printing or transfer methods. For example, a safety security, such as described in the specification of former patent granted to me No. 1114346 may be used as a base on which to producethe pictorial effect according to the present invention. Such effect may be produced before or as an intermediate step to any of the printings on the base to obtain a safety base.

In the wider application of the invention there is provided a novel means of varying the artistic rendering of any-pictorial subject which may be in black and white or in colors. n

One method for carrying out the invention is as follows :A printing surface is coated with any sensitized etching resist (fishglue being preferred) and on this resist is proas regards production of the intaglio printing surfaces. For example, images of both the tone picture and the design can be produced in one resist such as a carbon resist as by a second or double printing and before the developing. Again the tone picture and de sign can be photographed on the same sensitive plate, then printed on carbon tissue and transferred to copper for etching.

When printing in colors the printing surface produced by any one of the methods above described can be fine etched and used for printing in a second color. This fine etching and successive printing may be repeated several times.

In order that the invention might be more fully understood I append a sheet of drawings which illustrate in Fig. 1 a simple form of bank note design which might be used on a security, (although in practice a much more elaborate design is usual) and in Fig. 2 a pictorial representation of a portrait in which the portrait effect is seen without, however, the design being wholly obliterated.

Claims:

1. A. method of making a line engraving combining a tone picture with a bank note or other characteristic curvilinear design the elements of which are visible to the un aided eye, which consists in etching the said design through a characteristic tonal resist.

2. A method of making a line engraving combining a tone picture with a bank note or other characteristic curvilinear design, the elements of which are visible to the unaided eye, which consists in etching the said design through a characteristic tonal resist, that portion of the design incorporated with the picture being etched with varying tones or gradations corresponding with those of the picture.

3. The method of producing a plate for printing, consisting in applying to the metal printing surface a sensitized enamel resist, printing a bank note or other characteristic lineal design upon the resist, developing the same, transferring to the surface of said design a carbon or other gelatin film having a positive picture upon it, developing this picture and then etching through the combined picture and design, whereby the portions of the design beneath the picture will be etched with varying tones or gradations corresponding with the thickness of the gelatin of the applied picture.

4. A method of making a line engraving combining a tone picture with a bank note or other characteristic curvilinear design, the elements of which curvilinear design approximate to the contours of the tone picture, which consists in etching the said contour design through the tone picture.

5. A method of combining a tone picture with a bank note or other characteristic lineal design, which consists in covering a plate with a sensitized etching resist, producing upon said etching resist an image of a design, developing said image, superposing upon said developed image a tone picture resist, and then etching through the said tone resist and the design resist beneath.

ERNEST HONARD FARMER.

Witnesses Josnri-r C. DALE, L. C. GIFFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

